Because of the fast cooling of flowing medium, the hydrogen cracking occurs easily under in-service welding.
在役焊接过程中，管内流动介质的快速冷却，易使接头出现氢致裂纹。
Disadvantages include risk of hydrogen cracking in carbon steels and weld metal porosity in aluminium alloys.
缺点是在碳钢中有氢致裂纹、铝合金中有焊缝气孔产生的危险。
For the natural gas transmission pipeline, the special steel pipe that can resist hydrogen cracking should be developed.
对于天然气输送管道，需研制抗氢致裂纹的专用管线钢管；
The increase of weld current can reduce the hardness and the content of upper bainite, and lower the sensibility of hydrogen cracking of the joints.
在避免烧穿的前提下增大焊接电流能够减小硬度、减少上贝氏体，从而降低氢致开裂敏感性。
It has been applied to simulation training systems of the hydrogen cracking, hydrogen-making, and platinum reforming etc., and the satisfied effects are obtained.
将该算法应用于加氢裂化、制氢、铂重整等工业过程的仿真培训系统，取得了满意的效果。
The role of hydrogen embrittlement in stress corrosion cracking has also been discussed.
文中还对氢脆在应力腐蚀开裂中的作用进行了讨论。
The cracking and skeletal isomerization became more strong with the rise of reaction temperature, while oligomerization, cyclization and hydrogen transfer reaction became weaker.
随着反应温度的提高，裂化反应和骨架异构化反应增强，但齐聚反应、氢转移反应和环化反应减弱。
These results showed that the major mechanism of SCC for this system is hydrogen induced cracking.
这些结果表明应力腐蚀的主要机理是氢致开裂。
It was found that besides mangness sulphide, other kinds of inclusion would also cause hydrogen induced cracking(HIC)and SSCC.
除硫化锰夹杂外，其它脆性夹杂物也可诱发氢致开裂从而引起SSCC。
Cracking natural gas with thermal plasma is one of the technical tools to convert natural gas efficiently. With nitrogen as the working gas, the main products include acetylene, ethylene and hydrogen.
热等离子体裂解天然气是可以高效转化天然气的技术手段之一，当以氮气为工作气体时主要产物有乙炔、乙烯、氢气。
Acoustic-emission techniques have been used to determine the rate of cracking of high strength steel due to hydrogen embrittlement.
声发射技术已被用来确定高强钢因氢脆而开裂的速率。
Corrosion resistance play an important role in the reliability of pipeline steels, and HIC (Hydrogen Induced Cracking) is one of failure forms for pipeline.
耐蚀性是影响管道可靠性的重要因素，其中氢致裂纹是管道的失效形式之一。
The results showed that the oligomerization, cracking, skeletal isomerization and hydrogen transfer reaction of 1-heptene occurred on acid catalysts.
结果表明，庚烯-1在酸性催化剂上会发生齐聚、裂化、骨架异构和氢转移等反应；在较高转化率下，甚至会发生四聚反应。
Based on the NACE standard, the behavior of restriction on hydrogen induced cracking (HIC) and sulfide stress corrosion cracking (SSCC) of X80 grade pipeline steel was investigated.
依据NACE标准研究了X80级管线钢的抗硫化物应力腐蚀开裂(SSCC)和氢致开裂(HIC)行为。
Hydrogen induced delayed cracking has nothing to do with flaking and is attributed to hydrogen atoms.
氢致滞后开裂与白点无关，而与氢原子有关。
Hydrogen transfer is one of the characteristics of catalytic cracking reaction.
氢转移是催化裂化的特征反应之一。
The nitrogen-protecting system of the material tank farm for hydrogen-cracking-unit in one of Nanjing branch of Sinopec was unsatisfied in the protecting effect and more nitrogen-consuming.
中石化南京某分公司加氢裂化原料罐区氮封系统多年来存在着氮耗量大、氮封效果差的问题。
That is, deformation is a necessary condition for hydrogeninduced cracking and hydrogen induced cracking results from the interaction between hydrogen and dislocation.
结果表明，只有在充氢过程中进行塑性变形才能引起氢致开裂，即塑性变形是氢致开裂的必要条件，氢致开裂过程是氢与位错交互作用的过程。
The result showed proper reaction temperature, catalyst to oil ratio and short reaction time may detriment thermal cracking reaction, hydrogen transfer reactions, and get high propylene selectivity.
结果表明：适当的反应温度，剂油比，反应时间短，可能损害的热裂化反应，氢转移反应，并获得高的丙烯选择性。
High environment humidity increases the susceptibility to hydrogen induced cracking and stress corrosion cracking.
高湿度能增大氢致裂纹和应力腐蚀开裂倾向。
Stress concentrations can lead to initiation of cracking by fatigue, stress corrosion, or hydrogen-assisted stress corrosion.
应力集中可能会导致疲劳、应力腐蚀或氢基应力腐蚀而产生裂纹。
The threshold stress and fracture stress of hydrogen-induced cracking of X80 pipeline steel are studied by constant load test and slow stain rate test.
采用恒载荷和慢应变速率动态拉伸实验方法，测定了X80管道钢在不同充氢条件下的氢致开裂门槛应力和断裂应力。
Measures were taken to prevent welding cold cracking such as improve welding technology by decreasing cooling speed and adopting low-hydrogen electrode, etc.
通过改进焊接工艺来降低冷却速度和采用低氢型焊条等措施来控制焊接冷裂纹的产生。
The macro, chemical and metallographic analysis have been performed on the cracking failures of reformer tube for hydrogen generation.
针对制氢转化炉炉管多次开裂失效的情况，进行了宏观分析、化学分析以及金相分析。
There exist problems of cold-working hardening and hydrogen-brittle in the cold-drawing process for seamless steel tube, responsible for the cracking in the steel tube.
在无缝钢管的冷拔过程中，存在着冷作硬化和氢脆现象，它们是造成钢管开裂的主要原因。
In the first cracking stage grain boundary released more hydrogen than in the second stage.
而微空洞释氢则第二阶段多于第一阶段。
The hydrogen transfer activities of several modified materials were investigated and co related with the heavy oil catalytic cracking ability and olefin content in cracked naphtha.
考察了多种改性材料的氢转移反应活性及对催化裂化催化剂的重油转化活性及汽油中烯烃含量的影响规律。
The hydrogen transfer activities of several modified materials were investigated and co related with the heavy oil catalytic cracking ability and olefin content in cracked naphtha.
考察了多种改性材料的氢转移反应活性及对催化裂化催化剂的重油转化活性及汽油中烯烃含量的影响规律。
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